And now, back to my missing channel problem. . .
Just to fill in some history, I was listening to my MMF 7 the other day when I lost the right channel. It just went dead, no pops or crackles or smoke. While rechecking the pickup leads, I broke one of the lead wires. Coincidentally, it was the right side ground wire that I broke. Anyway, I was able to twist the broken ends back together and covered the bare wires with hotmelt glue. I have checked the continuity and all seems well with no cross connections. But still no right side. Could the problem be in the cartridge?
I swapped the cables R to L going into my 834P phono stage and there was no sound from the left side, so I still believe that the problem is upstream in the TT.
Anyone have any ideas on how to troubleshoot this?